(1) Manufacturing method: 304 stainless steel tube stainless steel acid-resistant steel, 304 stainless steel tube and steel division, weak, strong corrosive. It is made of steel pipe with corrosion resistance. The manufacturing method of seamless steel pipe is basically the same. According to gb14975-94 "steel stainless steel seamless steel pipe", through production, 1Cr13, 2Cr13, 3Cr13, 1Cr17Ni2, difficult to deform, 1Cr21Ni5Ti, 00Cr18Ni10, 1Cr18Ni9, 1Cr18Ni9Ti, 00Cr17Ni14Mo2, Manufactured from 0Cr18Ni12Mo2Ti, 1cr18ni12mo3ti, 1cr23ni18, 1cr18ni11nb and other steels.
(2) Uses: 304 stainless steel pipes are widely used in petroleum, chemical, pipeline and stainless steel structures for various purposes, parts, steels that should guarantee chemical composition and physical properties.
2 kinds:
After rolling, hot extrusion, hot extrusion and cold drawing (rolling) of stainless steel tubes. Stainless steel tubes in different semi-iron semi-martensitic stainless steel tubes, martensitic stainless steel tubes, stainless steel tubes, austenitic and ferritic iron-based stainless steel tubes.
3 specifications and appearance quality:
(1) According to the provisions of gb14975-94 "stainless steel seamless steel pipe", the length (not long) of hot-rolled steel is usually 1.5 ~ 10m, which is equal to or greater than 1 million steel hot extrusion. Cold drawn (rolled) steel pipe wall thickness 0.5 ~ 1.0mm, 1 ~ 7m; wall thickness greater than 1.0mm, 1.5 ~ 800.
(2) Hot rolling (extrusion) and 45 to 480 mm diameter steel pipe is 45; wall thickness is 4.5 to 45 mm 36. Cold drawn (rolled) and 6 ~ 200mm diameter steel pipe is 65; wall thickness is 0.5 ~ 21mm 39.
(3) The inner and outer surfaces of 304 stainless steel pipe shall be free from cracks, folds, breaks, cracks, rolling and pressing, separation and crucible defects. These defects shall be completely removed (except the processing pipe) and the wall thickness shall not be removed. Negative deviation from diameter. It is not clear that no negative deviations and other small surface defects are allowed.
(4) Straight allowable depth. Hot-rolled, hot-extruded steel pipe, diameter less than or equal to 140mm, not exceeding 5% of the nominal wall thickness, the maximum depth is not more than 0.5mm; cold drawn (rolled) steel is not more than 4% of the nominal wall thickness, not more than 0.3mm The maximum depth.
(5) Both ends of the 304 stainless steel tube should be cut at right angles and the burrs removed.
4 chemical composition test:

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